Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Fixes baremetal interface attach

    Change-Id: If0e501c218b1ea981caa255b5e217b5118b772b0
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 3990dbe..002537a 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 3990dbe40603eaf97a3a01ab6abba763510bb96c
+Subproject commit 002537a8dd9dde4f488e2be75f0f69ea43b500ba